ChemistryVinegar is a solution of acetic acid (C2H4O2) in water. Its concentration is 5.0%(w/w) and its density is 1.01 g/mL. That was the information given before the question, then it asked for the molarity of vinegar and I got .84mol/L
November 16, 2010

ChemistryHow many milliliters of pure acetic acid (density = 1.05 g/mL) would be required to prepare 1.00 L of the solution?
November 16, 2010

physicsA pendulum has a length of 1m. What is the period of this pendulum? What is the frequency of this pendulum? You measure the period of a pendulum and get 25s. What is the length of the pendulum?
November 8, 2010

physics If a 0.1 kg mass is suspended at rest from a spring near the Earth's surface, the distance that the spring is stretched is measured to be 1.0 cm. What is the spring constant of the spring (remember the MKS units)? A mass of 2 kg is attached to a spring with constant 18 N/...
November 8, 2010

ChemistryWhat is the percentage yield for a reaction if you predict the formation of 21 grams of C6H12 and actually recomvered only 3.8 grams? is the answer 18% 3.8g/21g x 100% pls verify.
October 17, 2010

mathAfter many attempts and variables, I came up with this: You start off with 3x5=15 Then, square the 6=36 Add 15+36=51 Take 51+54 which equals 105 and lastly, 105 minus 5 equals... 100!
August 30, 2010

child development AED 202I have my powerpoint presentation all set up. I am just having a hard time with health issues that are appropriate to each developmental issue. The assignment wasnt clear as to what kind of health issues and I dont know how these issues would differ between the two stages. If ...
June 26, 2010

algebra2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have 38 homes still for ...
March 31, 2010

algebra1. Imagine you are in the market for a new home and are interested in a new housing community under construction in a different city. a. The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to represent floor plan ...
March 31, 2010

ChemistryWhich of the following are correct symbols and charges? Could be as many as 5. 1. Na- 2. Ag+ 3. O2- 4. Ag- 5. NO3- 6. Cu2+ 7. F+ 8. Cl2-
March 21, 2010

psychologyExplain how having a negative self-schema affects ones social interactions. How does social intelligence affect ones responses in any given situation? How might a persons self-guides impact his or her perspective on the world?
March 19, 2010

mathShort projectile motion question A German rocket from the second world war had a range of 3000meters reaching a maximum height of 1000meters. Determine the rockets maximum velocity
March 12, 2010

mathone side of a right triangle has 2cm less than the hypothuse, and 7cm more than the third side what is the lenghnt of each side
March 12, 2010

weather/scienceI had to create a chart of air temperature, pressure, and was the pressure rising or falling. One of my questions about it is "were there any values that you could predict ahead of time?" can someone help me with this question please?
February 22, 2009

Physical ScianceCalculate the density for a rectangular block using the following measurements, Length: 2.70cm, Width:1.10cm, Height: 9.09cm, Mass: 72.17g. Round your answer for density to 2 decimal places. Include the correct unit for density.
February 26, 2008

EconomicsIn a regression analysis, suppose there is, in fact, no seasonal pattern to sales, and the trend line is estimated using dummy variables to account for seasonality. What effect would this have on the estimation? My guess is that it wouldn't affect the estimation....am I ...
January 29, 2008

scienceIf 8 paper clips are placed on one side of the balance 2 cm from the fulcrum,where should 4 paper clips be placed on the other side?
January 2, 2008

Abstract AlgebraLet H={a+bi a,b is a element R, a^2+b^2=1} be a subset of the non zero complex numbers C*. Prove that H<C* under complex multiplication using the one-step subgroup test. Also describe the elements of H geometrically.
December 7, 2007

pre-calto find the distance AB across a river, a distance BC= 309m is laid off on one side of the river. It is found that B= 105.4 degrees and C= 12.2 degrees. Find AB To find the distance AB across a river, a distance BC= 309m is laid off on one side of the river. It is found that /...
June 5, 2007

Algebra 2I need help-exam tomorrow! Although it is too late for your exam, in the future, we need specifics to provide help plus time to respond. We are volunteers and are not available 24/7. I hope this helps you in submitting future questions. Thanks for asking.
May 22, 2007

physics1- a pipe of diamter 1cm carreiers water flowing at 1m/s. the end of the pipe is bplugged and there is a small holeon the top as shown which is 1mm diameter. How high does the water go? *=hole ()____________*___() 2. you're indoors, with a door 1m wide and 2.5m high. the ...
December 5, 2006